The estimated resident population (ERP) for South Australia was 1,618,200 at 31 March 2009, an increase of about 18,600 persons (1.2%) since 31 March 2008. Nationally, the ERP was 21,779,100 at 31 March 2009, an increase of about 439,100 persons (2.1%) since 31 March 2008.

For the year ended 31 March 2009, South Australia recorded a natural increase (i.e. the net of births and deaths) of 7,048 persons. Net overseas migration provided a gain of 16,536 persons in the same period while net interstate migration realised a loss of 4,988 persons.

For the year ended 31 March 2009, Australia recorded a natural increase in population of 160,822 persons; net overseas migration resulted in a gain of 278,239 people.